Mode of making boiler-stays



(No Model.)

G. L. MGGREGOR.

MODE OF MAKING BOILER STAYS.

No. 430,672. Patented June 24, 1890.

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momrmu vnsnmnun n c UNITED STATES PATENT OFFICE.

GEORGE L. MOGREGOR, OF CHICAGO, ILLINOIS.

MODE OF MAKING BOILER-STAYS.

SPECIFICATION forming part of Letters Patent No. 430,672, dated June 24,1890.

Application filed April 3, 1890. Serial No. 3%,419. (N0 model.)

To all whom it may concern.-

Be it known that I, GEORGE L. McGREGoR, a citizen of the United States,residing at Chicago, Cook county, Illinois, have invented a new anduseful Improvement in Boiler-Stays and Processes for Making the Same, ofwhich the following is a specification.

In making boiler-stays it has heretofore been customary to first formthe feet or part to be attached to the head of the boiler, then to weldonto this a bar of iron forming the shank, and to weld to this bar inturn a flat piece of iron adapted to be secured to the shell of theboiler. This has rendered seven heatings necessary in making every stay,and has therefore been expensive and taken considerable time. My objectis to avoid these defects, and I form a stay out of a single piece ofsheet-steel, without any welding whatever and at. a single heating; andthe invention consists in the process and features and details ofconstruction, hereinafter. described and claimed.

In the drawings, Figure 1 represents a plan View of the metal blank fromwhich the stay is made; Figs. 2 and 3, similar views showing the staypartially and entirely completed, respectively; and Figs. 4, 5, and 6are end views of Figs. 1, 2, and 3, respectively.

A is the metal blank; A, a slit therein; a a, holes drilled therein; BB, the edges of such blank.

0 C are the feet of the completed stay; D, the shank, and E the bodythereof.

In making my improved stay I first form a blank A out of any suitablematerial, as steel plate, and preferably of the shape shown in Fig. 1,and drill or punch in the same four holes a a, substantially in therelative positions shown, and of a proper size to receive the rivets. Inthe upper end of this blank I form a slit A, its depth being equal tothe length of the feet, as hereinafter described. The upper end ofthisblank for a suitable distancesay, about to the line X X-is thenheated to the proper temperature, and its edges 13 B are lapped orfolded together, curving gradually up from the flat portion or body ofthe blank. Fig. 2 represents this stage of construction, the blank beingfolded for a portion of its length and left fiat for the remainder toform the body E. The upper portions of the blank are bent-one to theright and the other to the left-substantially at right angles to theshank, forming the completed stay, as shown in Fig. 3.

' In applying this device the feet C C are fastened by suitable means tothe head of the boiler and the body E to its shell.

I claim 1. The improvement in the art of manufacturing boiler-stays,which consists in forming a metal blank A with a slit A, bending up thesides of the blank throughout a portion of its length to form the shankD, and bending out the upper ends of the bent sides to form the feet,substantially as described.

2. The improvement in the art of manufacturing boiler-stays, whichconsists in forming a sheet-metal blank AWith a slit A and holes a a,folding the blank together throughout a portion of its length, thusforming a shank D, and a flat body E, adapted to be secured to the shellof the boiler, and finally bending out the upper ends of the foldedportion at right angles to the shank to form feet to be secured to theboiler-head, substantially as described.

3. A boiler-stay made from a single piece of sheet metal and comprisinga flat body E, a shank D, and feet C C, substantially as described.

4. A boiler-stay made out of a continuous I metallic blank -by bendingthe same to form feet 0 C to be secured to the boiler-head, a shank D,and a flat body E, to be secured to the boiler-shell, substantially asdescribed.

GEORGE L. MCGREGOR. Witnesses:

THOMAS A. BANNING, SAMUEL E. HIBBEN.

